Hammer nut



FIG. 1 is a front, top, right perspective view of a hammer nut showing the new design;

FIG. 2 is a rear, top, left perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof.

The broken lines of uneven length shown in the drawings illustrate the boundary of the claimed design and form no part thereof. The broken lines of even length shown in the drawings illustrate portions of the hammer nut that form no part of the claimed design. 

CLAIM The ornamental design for a hammer nut, as shown and described. 